Relay.



F. R. MGBERTY.

RELAY.

APPLICATION FILED 113.26, 1910.

1,107,536. Patented Aug. 18, 1911 Wfua-MA Fmg/1 R. /v/Ceffy 'by y UNITEDSTATES PATENT OFFICE.

FRANK R. MUBERTY, 0F NEW ROCHELLE, NEW YORK, ASSIGNOR T0 WESTERNELECTRIC COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

RELAY.

Specification of Letters Patent.

Patented Au". 18, 1914.

Application led February 26, 1910. Serial No. 546,136.

To all 'whom it may concern Be it known that I, FRANK R. MoBnn'rY,citizen of the United States, residing at New Rochelle, in the county oflVestchester and State of New York, have invented a certain new andusefulvlmprovement in Relays, of which the following is a full, clear,concise, and exact description.

This invention relates to relays and more 1)articularly to relays of thetype adapted for use with telephone exchange systems.

Relays adapted for service in circuits where they are required torespond to comparatively feeble current, or to work on narrow margins ofcurrent, must be extremely accurate in adjustment, and it is desirablethat such relays be permanently adjusted when assembled, and ruggedenough to maintain their original adjustment despite considerablehandling and use.

It is the purpose of this invention to provide a relay construction frommachinemade parts which will fulfil these conditions. Heretofore, it hasbeen found very difficult to construct edicient relays of this type withmachine-made parts, for the reason that it is impossible to producesimilar parts eX- actly alike, even with the greatest care.Consequently, upon the assemblingr of the various machine-made partsinto a finished relay, these minor differences tend to becomecumulative, and many are found to be out of adjustment and inoperative.

The invention contemplates a relay kconstruction wherein the circuitterminals which control the range ofA movement of the armature as wellas its distance from the pole face shall each be fitted directly over acommon uniform support carrying the helix, which becomes in effecti adatum plane.

The invention may be carried out by eX- tending the core beyond theforward end of the helix and fitting over said core the metallic plates.wherein terminate the `eircuits to be controlled, anvarinature beingsuitably mounted to rock between said metallic plates. As shown, theplates may have ciri'rular recesses whereby they lare fitted over acylindrical core extension of less crosssectioiial area than the coreitself, andthe Contact plates may have ears struck off at right anglesand lying in different vertical planes so as to accommodate between thema contact carried by an armature mounted at the side of the core.

The various features of my invention will be more readily understoodwhen particularlj,7 described with reference to the appended drawings,wherein- Figure l is a perspective view of a relay constructed inaccordance with my invention;Fig. 2 is a side elevation thereof; Fig.'is a side elevation of the relay reversibly as to that of Fig. 2; Fig.Ll is an end elevation; Fig. 5 is a plan view; Fig. (i is a view of thearmature removed from its support; and Fig. 7 illustrates the bridge',contact plates and insulating plates in the relative positions theyassume before assembly.

The same reference characters are used to designate like partsthroughout the drawings. y

The energizing winding 1 of the relay is wound upon a cylindrical core 2provided with the usual heads 3, 4 of insulating material, such as fiberor the like, the said core protruding for some distance beyond theforward end of the helix. The yoke or return pole-piece 5 is securedatthe rear to the core and is then bentat right angles, passing parallelto the core and terminating near the forward end thereof. The extendedforward end of the core may be reduced in cross section and may directlysupport a pair of metallic plates 7,'8 forming circuit terminals, but inorder to provide a more eflicient relay in which the magnetic circuit iscompleted solely by way of the armature,

I prefer to form the forward extension of the core with a centrallongitudinal recess into which is fitted a pin 6, preferably of brass orother suitable non-magnetic material, which together with the core Qforms a support for the plates 7, 8, also of brass,

mounted directly upon, but insulated from, the periphery of said pin,and for the helix l, a non-magnetic bridge 19 being provided forsupporting the armature 30 at the side of the core, said armature havinga Contact playing between the lugs 9 and l() of said plates. lVith aview to compacliicss the upper portion of the platesI and lfiidge arc soshaped as to contorni to the contour of the core. the same whenassembled forming practically a continuation thereof. lEach of the4plates 7, 8 is provided with a rearward springextension 1G to enableconvenient connection to be made at the rear to the circuits with whichthe relay may be associated.

ln order to prevent lateral displacement ot the metallic plates and toanchor them centrally over, but clear ot, the mounting pin G. lugs 14e,1l" are provided on said plates i', 8 adapted to register with slots 15,18 respectively in the insulating plates 12, 13, and it will be notedthat since the openings in the metallic plates areconsiderably largerthan those ot the insulating plates, the liability of said pinshort-circuit-ing said plates is eliminated. rllhe remaining openings32, 33 in the respective insulating plates 12, 13 are idle, not havingany function, their presence being due to an advantage in manufacturewhereby the cost is cheapened.

lin assembling the relay, the bridge i9, insulating plates 11, 12, 13and contact plates 7, S are placed together in the rela-tive positionsshown in l? ig. Z with their openings alined and the lugs lll and 17registering.

with openings and 18 respectively. The mounting pin G is then passedthrough the bridge and plates and threaded into the core, the tighteningof said pin lirmly binding the various parts together and to the end otthe core 2. l screw 29 secures said bridge to the yoke, the cars 34h, 35passing on either side thereof. i

rlhe armature 3@ is ulcrumed to the bridge 19 at the side oit the coreextension by means of a pin 23 and serves to complete the magneticcircuit. The said armature carries platinum contacts adapted to rockbetween the contacts of the plates 7, 8. t convenient armaturemounting'for this type of relay is the one shown, which consists of abrass plate 28, provided with an arm, having platinum contacts on eachface, adapted to rock between the lugs 9,V 10, the said plate beingsecured to the armature by a screw 31 and coperating with it to providea longitudinal groove in which is tightly wedged a pin 23 by means ofwhichv the said armature and plate are ulcrumed to the bridge 19. Theengagement of arms 2d, 25 O said armature with the ears 26, 27 ot saidplate prevents relative movement between said armature and plate. Aspring serves to maintain the armature normally retracted and isanchored at one end to a downward extension 2l oi" the bridge, and atits other end to a similar extension 22 of the plate 28,

the bridge 19 being cut away to admit of the passage oi? said extension22.

Having described my invention, claim: 1. ln a relay, a helix, a memberextending through said helix, a plurality of contact plates and anarmature-support each surrounding said member and being mounted side byside thereon, and an armature movable upon said armature-support.

2., ln a relay, a helix, a supporting member of magnetic materialextending through said helix, a bracket mounted upon said supportingmember, an armature mounted upon said bracket andmoving in a directiontransverse to the aXis ot said helix and cooperating therewith, andcontacts mounted upon said support and controlled by said armature inits movement.

3. lin a relay, the combination with a helix, of a core projectingbeyond the torward end thereof and provided with an axial opening, a pinsecured in said opening and supporting a plurality ot Contact platesinsulated from each other and from said core, and an armature having anarm adapted to rock between said plates.

ln a relay, the combination with a helix, ot a core projecting beyondthe forward end ther'eoi3 and having an axial opening, of a. cylindricalpin secured in said opening and adapted to insulatively engage a pair otcontact plates, each ot said plates having a lug bent at right angles tothe plane ot" said plates and lying in different vertical planes on oneside of the said core, and an armature mounted alongside said coreextension and having an arm adapted to rock between said lugs.

5. ln a relay, the combination with a helix, of a cylindrical coreextending beyond the forward end thereof, of a cylindrical pin ofnon-magnetic material fitted in an opening in the forward end of saidcore, a yoke of magnetic material secured to the rear of said core andextending longitudinally of said core, a pair of non-magnetic platesfitting over but insulated from said pin and having extensions passinglongitudinally to the rear of the relay, a non-magnetic armaturemounting secured to said yoke at its forward end and to said pin, anarmature tulcrumed to said mounting and lying in a plane parallel withthe core axis, said armature having a laterally extending arm adapted toengage said insulated plates.

6.. ln a relay, the combination with a cylindrical core projectingbeyond the torward end ot the helix, et a cylindrical pin otnon-magnetic material iitted centrally in an opening in the forward endot' said core, a magnetic yoke connected to the rear of said core andterminating near the front of said core, a pair of non-magnetic platesfitted over but insulated from said pin and from each other and eachhaving an ear struck ofi at right angles thereto and lying to one sideot said core in different "vertical planes, a bridge-piece secured atone end to CFK llt)

said pin and at its other end to the torward end of said yoke, anarmature fulcrumed my name this 25th day of February A. D., upon saidbridge-piece and lying in a plane 1910. v -parallel to the core axis,and a, non-magnetic FRANK R. MCBERTY.

plateseoured to said armature and having Witnesses: 5 an arm adapted torockbetween said ears. IRVING MACDONALD,

In Witness whereof, I hereunto subscribe MORGAN WASHBURN, J r.

